Incandescent gas-lamp.



no. 703,978. Patented July 8, I902.

L. T. ALTON.

INCANDESCENT GAS LAMP.

(Application filed Mu. 26,1901.)

(No Model.)

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UNITED STATES I ATENT OFFICE.

LEE T. ALTON, OF BROOKLYN, NEW YORK.

INCANDESCF'NT GAS-LAM P.

SPECIFICATION forming part of Letters Patent No. 703,978, dated July 8,1902.

Application filed March 26, 1901. $erial No. 52,895, (No model.)

To all whom, it may concern:

Be itknown that I, LEE T. ALTON, a citizen of the United States,residing at the city of New York, borough of Brooklyn, county of Kings, andState of New York, have invented certain new and useful Improvements inIncandescent Gas-Lamps, of which the following is a specification.

My invention has relation to lamps wherein gas or other equivalentilluminating medium is employed in connection with a mantle for thepurpose of producing an incandescent light on the system popularlyknown' as the Welsbach.

My invention has primarily for its object to increase the power of theinduced current of air emanating from the burner of this type, to theend that the gas-pressure or speed with which the gas is fed to theburner may be accelerated and at the same time thoroughly heat the gason its passage to the burner, thereby intensifying the light, producinga more complete admixture of air and gas, improving the quality andintensity of the light, economizing in the cost of producing thelight,and at the same time reducing the temperature of the air and heatedmaterial immediately adjacent the zone of combustion.

My invention therefore consists in an apparatus by means of which theforegoing results are obtained and also in the construction andcombination of parts hereinafter described, and further pointed out inthe claims.

In the drawings forming part of this specification, Figure 1 is asectional elevation of a lamp embodying my improvements. .Fig. 2 is anenlarged sectional elevation of a reser voir and a group of burners ofconventional form. Fig. 3 is a plan view of thelamp, taken approximatelyon the line so m, Fig. 1,1ookingin the direction of the arrows. Fig. 4:.is a plan view of the air band or ring, and Fig. 5 is a side elevationof the same.

I have illustrated my invention in connection with a lamp comprising aseries or group of burners superposed upon a reservoir and a pipeleading from a suitable source of supply of illuminating medium leadingto and passing through the reservoir to a valve controlling the passageof the illuminant from the supply-pipe to the burners; but it must beunderstood that I do not limit myself to such a form of burner orreservoir, and any suitable or desired form of burner will answer mypurposes.

In the embodiment of my invention illustrated herein, 1 is a pipeadapted to be secured to or placed in communicationwith a source ofilluminant, asby the coupling 2, which latter may serve the additionalpurpose of suspending the lamp. At 3 is the reservoir of usual shape,having a crown-piece 4, provided with an apertured and threadedlug 5,through which the supply-pipe l passes,'and an enlargement (orvalve-casing) 6, having a transverse conical bore 7 for the reception ofa valve 8, the enlargement constituting the easing of the valve, thevalve being provided with an elongated groove 9, opening intocommunication witha port 10, into which the end of the supplypipe 1extends, and with another port 11, leading from the valve to theinterior 12 of the reservoir 3. Below the valve 8 the valve-casing 6 isprovided with a lug 13, having a borelei in line with the bore of thesupply-pipe and the port 10, the end of the lug being threaded toreceivea cap 15, adapted to catch the drip and to be removed to discharge thesame. The-end of the valve is provided with an operating-handle 16, andthe valve may have the conventional stop to limit its rotation foropening and closing the passage of gas into the reservoir. Upon thereservoir is a superposed group of conventionally-constructed burners.In this special instance they comprise a nipple 17, passing through thecrown-piece 4 of the reservoir, the nipple carrying an aperturedgas-regulating check 18, and the apertured mixing-dome 19, an invertedconical tube 20 supportinga burnertip 21, provided with means forsupporting a suitable mantle. So far as my present invention isconcerned these details of construction may be modified to suitparticular conditions or requirements, the only essential to my presentinvention being that there shall be a burner, means for supplying theburner with an illuminant, preferably a pipe, and further meansinterposed between the supply and burner for regulating or checking thesupply of illuminant to the burner.

At 22 are clips of any suitable'construction secured to the crown-piece4 of the burner, which clips are adapted to support an inclos ingmedium, such as a globe 23, preferably of glass, said globe beingprovided with a superposed annular rim 24. The globe is secured to theclips 22 in the usual way,

5 such as by means of the clamping-screws generally used. Upon or abovethis globe is supported an elongated draft tube or chimney 25. I preferthe following construction for the same. In order to provideasubstantially close fit of the draft-tube about the globe, (which tubemay be made up of one piece or built up in sections of metal or otherdesired material, as may be most suitable for the purposes of myinvention,) I form at the base I thereof an annular rim 26, having upperand lower horizontal flanges 27 28 and a vertically connecting flange29, the horizontal flange 27 supporting the draft-tube upon the annulartop or rim 24 of the globe, the lower horizontal flange 28 preferablyimpinging against the globe-rim, thereby providing a firm and stablesupport of the draft-tube upon the globe, and an annular chamber 30,within which insulating-packing can be placed for cooling or which maybe left open for a cooling body of air. To the vertical web 29 of theflange may be secured another ring 31, provided with outwardly-extendingarms 32 for supporting a reflector 33. Above the annular flange andpreferably of the same diameter as the rim 24 of the globe is a circularor annular shoulder 34, provided with a series of apertures 35, andabout this shoulder and supported upon the horizontal web 27 is 35 aring 36, (shown in Figs. 4 and 5,) provided with apertures 37 and a pin38, extending therefrom, the ring being adapted to be rotated about theshoulder and bring its apertures into alinement with the apertures 35 in40 the shoulder to permit air to pass into the draft-tube from above theburners or be excluded therefrom by-bringing the apertures in'the ringout of alinement with the apertures in the shoulder in the usual manner.

At 39 is the main body or section of the draft-tube 25, which ispreferably of considerable length and of markedly restricted diameter,the tubular lower end of the main body of the tube being connected withthe annular shoulder 34 by a coned intermediate section 40, which may beornamented, as illustrated. At the upper end of the main section issecured a deflector 41 to prevent currents of air passing down into thetube and for flaring the opening or exit therefrom, so

as to allow easy egress of the air, and to the upper end of the tube issecured an inverted- U shaped band 42, provided with an opening throughwhich the supply-pipe 1 passes,which 6o band supports a cap or cowl 43,likewise preventing down currents of air, the union securing-the cap onthe band and holdingit firmly in place above the lower deflector. Itwill be noted that the supply-pipe 1 passes throughout the long andattenuated draft tube, through the conical portion, which is quite largeat its base compared with the point of connection with the main sectionof the tube,

through the globe, which latterforms,through I the means hereinbeforedescribed, an inclosing chamber for the air immediately adjacent theburner or burners, to the reservoir, through the latter to the Valve,and is placed in communication with the reservoir. and burner or burnersby the Valve and ports hereinbefore described. The long attenuateddraft-tube creates an induced current of air and gas of considerableintensity, operating'upon the supply of gas or other illuminant byviolently sucking it through the burners, it being considerably heatedby its passage through the supply-pipe to the burners, the supply-pipebeing surrounded by the rapidly passing and heated column of air, whichlatter being forcibly drawn up through the attenuated draft-tubeconstantly and rapidly keeps a supply of cool air within the globe,making more perfect the admixture of air and gas and keeping the globeand lower part of the burner comparatively cool. The

ascending volume of heated air passes into the enlarged part of theCOIllOl connection when it becomes more confined and enters into thelong tubular section of the drafttube under considerable pressure andwith great velocity. I prefer that the supply of air through theshoulder 34 be shut off through the medium of the ring, (and it may bepermanently closed;) but under certain conditions it may beadvantageous, especially for the purpose of cooling the draft-tube andwhere the maximum conditions may not be absolutely essential, to admitmore or less of the exterior atmosphere to the draft-tube.

Having described my invention, I claim- 1. In a gas-lamp the combinationwith a burner, ofaglobe, provided with an annular rim and iuclosing saidburner, and a drafttube superposed above said globe and pro vided withan annular channeled projection at the base thereof surrounding said rimand forming therewith an annular chamber at the top of the globe.

2. In a gas-lamp, the combination with a burner, of a globe, providedwith an annular rim and inclosing said burner, a draft-tube superposedabove said globe, provided with a perforated base portion and an annularchanneled projection below said perforated portion surrounding said rimand forming therewith an annular air-chamber, and a circular bandrevolubly supported on said annular projection and provided withperforations adapted to register with the perforations in the baseportion of the draft-tube for admitting air to the draft-tube whendesired.

Signed in the city, county, and State of New York this 25th day ofMarch, 1901.

LEE T. ALTON.

WVitnesses:

CHAS. G. I-IENsLEY, SOPHIE SEKosKY.

